Published May 13, 2010 at 2:06 PM | Updated at 2:44 PM EDT on May 30, 2012

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Simpson spent two days on the LA set for the show playing a beautiful, blond celebrity named Jessica Simpson who is not happy with her agent -- and no doubt she nailed this one!

A source at HBO tells us that Ari Gold (Jeremy Piven) scrambles to keep his unhappy client in his growing empire. Good luck with that one.

An entourage-less Simpson left behind her posse for the two-day shoot. This real-life posse was very evident on the dreadful "Price of Beauty" which was like some kind of international bad dream on VH-1.

Hopefully a little real, "Entoutage" laughter with Piven will help us forget that program. We can only hope Piven stayed in character long enough to give her a little career advice.

Simpson gave a tweet about her experience: "I have the utmost respect for the entire cast and crew of Entourage! Thank you for making the past 2 days memorable :)"

Piven's arc these season has him moving into sports and recently Cowboys owner Jerry Jones appeared on the show. But we're told there will not be any Tony Romo jokes.